1. Department of Pediatrics, School of Medicine, Universidad Nacional de Colombia, Bogota, Colombia
2. Department of Pediatric Pulmonology and Pediatric Critical Care Medicine, School of Medicine, Universidad El Bosque, Bogota, Colombia
3. Department of Internal Medicine, School of Medicine, Universidad Nacional de Colombia, Bogota, Colombia
4. Division of Pediatrics, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile